You Do Need power plug adapter while traveling from Tunisia to American Samoa.

Here is Why You Need An Adapter

The outlet and plug type used in American Samoa are A, B, F and I and in Tunisia are C and E. This is how they look like.

Tunisia

In Tunisia, outlets of type C and E are in use.

Type C

Type E

American Samoa

In American Samoa, outlets of type A, B, F and I are in use.

Type A

Type B

Type F

Type I